{"id":99801,"date":"2019-05-17T10:59:25","date_gmt":"2019-05-17T09:59:25","guid":{"rendered":"https:\/\/www.crownoil.co.uk\/?page_id=99801"},"modified":"2026-01-12T15:08:17","modified_gmt":"2026-01-12T15:08:17","slug":"fuel-polishing-faq","status":"publish","type":"page","link":"https:\/\/www.crownoil.co.uk\/faq\/fuel-polishing-faq\/","title":{"rendered":"Fuel Polishing Service FAQs"},"content":{"rendered":"\n<div class=\"wp-block-crownoil-content-spacer content-spacer\">\n<h2 class=\"wp-block-heading h1\" id=\"h-what-is-fuel-polishing-and-what-are-the-benefits\">What is Fuel Polishing and What are the Benefits?<\/h2>\n\n\n\n<p>We receive many questions from our customers about fuel polishing, so we\u2019ve created this FAQ to support anyone considering diesel polishing as a way to improve fuel quality. Here, you&#8217;ll learn how this non-disruptive, cost-effective service can help protect your fuel, extend its lifespan and ensure optimal performance.<\/p>\n\n\n\n<p>Don&#8217;t let contamination be the weak link in your operation. If you\u2019d like to learn more and discuss any issues you&#8217;re having with your fuels or storage tanks, call our fuel experts today on <a href=\"tel:03301231444\" class=\"rulertel\">0330 123 1444<\/a> to get started and see how we can help you.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-crownoil-content-spacer content-spacer\">\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1900\" height=\"600\" src=\"https:\/\/www.crownoil.co.uk\/wp-content\/uploads\/2019\/12\/Fuel-Polish-FAQ.jpg\" alt=\"Fuel Polish FAQ\" class=\"wp-image-102409\" srcset=\"https:\/\/www.crownoil.co.uk\/wp-content\/uploads\/2019\/12\/Fuel-Polish-FAQ.jpg 1900w, https:\/\/www.crownoil.co.uk\/wp-content\/uploads\/2019\/12\/Fuel-Polish-FAQ-300x95.jpg 300w, https:\/\/www.crownoil.co.uk\/wp-content\/uploads\/2019\/12\/Fuel-Polish-FAQ-1024x323.jpg 1024w, https:\/\/www.crownoil.co.uk\/wp-content\/uploads\/2019\/12\/Fuel-Polish-FAQ-768x243.jpg 768w, https:\/\/www.crownoil.co.uk\/wp-content\/uploads\/2019\/12\/Fuel-Polish-FAQ-1536x485.jpg 1536w\" sizes=\"auto, (max-width: 1900px) 100vw, 1900px\" \/><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-crownoil-content-spacer content-spacer\">\n<div class=\"wp-block-crownoil-faq-panel faq-panel\"><search class=\"faq-panel__search\"><form class=\"crown-form\"><label class=\"faq-panel__header\" for=\"faq-panel-input\">Search&#8230;<\/label><div class=\"form__field\" style=\"display:flex\"><div class=\"form__input-wrapper\" style=\"inline-size:100%;max-inline-size:450px\"><input type=\"search\" id=\"faq-panel-input\" name=\"faq-panel-input\" class=\"faq-panel__input form__input\" placeholder=\"Enter a search term here\"\/><\/div><button type=\"submit\" class=\"faq-panel__button button\">Search<\/button><\/div><\/form><\/search><div class=\"faq-panel__faqs\">\n<div class=\"wp-block-crownoil-tabs tabs tabs--horizontal\">\n<nav class=\"wp-block-crownoil-tabs-item-container tabs__navigation\">\n<button class=\"wp-block-crownoil-tabs-item tabs__item tabs__item--active first_tab\">Fuel Polishing Overview<\/button>\n\n\n\n<button class=\"wp-block-crownoil-tabs-item tabs__item\">Process &amp; Mechanics<\/button>\n\n\n\n<button class=\"wp-block-crownoil-tabs-item tabs__item\">Logistics<\/button>\n\n\n\n<button class=\"wp-block-crownoil-tabs-item tabs__item\">Cost &amp; Availability<\/button>\n<\/nav>\n\n\n\n<div class=\"wp-block-crownoil-tabs-panel-container tabs__panels\">\n<article class=\"wp-block-crownoil-tabs-panel tabs__panel tabs__panel--active\">\n<div class=\"wp-block-crownoil-content-spacer content-spacer\">\n<button class=\"wp-block-crownoil-accordion-toggle-all accordion__toggle-all\">Toggle All +<\/button>\n\n\n\n<details class=\"wp-block-crownoil-accordion accordion\" style=\"--accordion-clr-1:#d8222a;--accordion-clr-2:#d8222a\"><summary class=\"accordion__header\">What is fuel polishing?<\/summary><div class=\"accordion__body\">\n<p><a href=\"https:\/\/www.crownoil.co.uk\/services\/environmental\/fuel-polishing\/\">Fuel polishing<\/a> is an advanced, mechanical cleaning process that removes harmful sediment through filtration and circulation, such as water, sludge and microbial contamination (<a href=\"https:\/\/www.crownoil.co.uk\/guides\/diesel-bug-contamination-guide\/\">diesel bug<\/a>).<\/p>\n\n\n\n<p>Fuel is removed from the tank and filtered back into the existing tank or a new tank in an optimum state, without any downtime to equipment or machinery in use.<\/p>\n\n\n\n<p>Some of the most common fuels that we are approached to help with our fuel polishing procedures are <a href=\"https:\/\/www.crownoil.co.uk\/products\/red-diesel\/\">red diesel<\/a> (<a href=\"https:\/\/www.crownoil.co.uk\/products\/gas-oil\/\">gas oil<\/a>), <a href=\"https:\/\/www.crownoil.co.uk\/products\/diesel\/\">diesel<\/a> (<a href=\"https:\/\/www.crownoil.co.uk\/products\/diesel\/\">DERV<\/a>), <a href=\"https:\/\/www.crownoil.co.uk\/products\/biodiesel\/\">biodiesel<\/a> and <a href=\"https:\/\/www.crownoil.co.uk\/products\/kerosene\/\">kerosene<\/a>.<\/p>\n<\/div><\/details>\n\n\n\n<details class=\"wp-block-crownoil-accordion accordion\" style=\"--accordion-clr-1:#d8222a;--accordion-clr-2:#d8222a\"><summary class=\"accordion__header\">Is fuel polishing necessary?<\/summary><div class=\"accordion__body\">\n<p>If you\u2019ve ever experienced engine breakdown, fuel starvation, blocked filters, water or any other contaminant in your fuel, then you need a fuel polishing system. The consequence of a complete power failure could be the loss of millions of pounds in a data centre, loss of food overnight in a supermarket or, catastrophically, loss of life in a hospital.<\/p>\n\n\n\n<p>Whatever your application (generators, storage tanks, marine vessels, etc.), fuel polishing is the simplest and cost-effective way to protect from contamination.<\/p>\n\n\n\n<p>When fuels are stored for long periods of time, and aren&#8217;t regularly tested and treated, diesel bugs build up and cause havoc in machinery, equipment and vehicles. Diesel polishing has the ultimate goal to keep the fuel usable without having to fork out money to replace it with a new batch.<\/p>\n\n\n\n<p>Before fuel polishing services are carried out, the fuel must be analysed and tested so that the exact problem can be identified and treated with the most appropriate solution. If it\u2019s too severely contaminated, it\u2019s likely that it\u2019s not salvageable and therefore polishing would be a waste of time and money.<\/p>\n\n\n\n<p>To determine whether your fuel needs polishing, we use a particle counter to analyse your fuel\u2019s condition to measure any unwanted particles that have accumulated in your tank. Using a traffic light system, we\u2019ll provide a detailed insight into its quality; green indicates that the fuel meets current legislation, amber means that the fuel is just under the required criteria and needs polishing and red, which demonstrates that an intensive fuel polishing treatment is needed.<\/p>\n<\/div><\/details>\n\n\n\n<details class=\"wp-block-crownoil-accordion accordion\" style=\"--accordion-clr-1:#d8222a;--accordion-clr-2:#d8222a\"><summary class=\"accordion__header\">I&#8217;m new to fuel polishing, where can I find out more?<\/summary><div class=\"accordion__body\">\n<p>Trying to decipher which service will best suit your requirements and budget can be daunting. We recommend booking a <a href=\"https:\/\/www.crownoilenvironmental.co.uk\/book-fuel-system-inspection\/\" target=\"_blank\" rel=\"noreferrer noopener\">free site survey<\/a> by the expert team at <a href=\"https:\/\/www.crownoilenvironmental.co.uk\/\" target=\"_blank\" rel=\"noreferrer noopener\">Crown Oil Environmental<\/a>, who can identify any fuel-related problems and fix them with the appropriate solution.<\/p>\n<\/div><\/details>\n\n\n\n<details class=\"wp-block-crownoil-accordion accordion\" style=\"--accordion-clr-1:#d8222a;--accordion-clr-2:#d8222a\"><summary class=\"accordion__header\">How does fuel become contaminated?<\/summary><div class=\"accordion__body\">\n<p>2011 saw the introduction of revisions to the EN590 fuel regulation. This led to an increase in biodiesel content and a reduction in sulphur content to virtually zero.<\/p>\n\n\n\n<p>Contaminants ideally need to be caught by the primary filters; however, bacteria (the most common contaminant) are generally a large biomass quantity that will quickly block filters, and if left untreated, can double in size every 20 minutes.<\/p>\n<\/div><\/details>\n\n\n\n<details class=\"wp-block-crownoil-accordion accordion\" style=\"--accordion-clr-1:#d8222a;--accordion-clr-2:#d8222a\"><summary class=\"accordion__header\">What are the benefits of fuel polishing?<\/summary><div class=\"accordion__body\">\n<p><strong>Reduced costs<\/strong> &#8211; When fuel is contaminated, many people get their fuel uplifted and replaced as a quick solution. But with moderate contaminant levels, fuel can be polished and dosed with the necessary additive\/biocide, which is less expensive, less wasteful and more environmentally-friendly.<\/p>\n\n\n\n<p><strong>Non-disruptive<\/strong> &#8211; Our polishing units connect to your fuel supply in a parallel fashion, so your infrastructure can carry on functioning while the supply is polished. That way, your fuel is restored to perfection without halting your operations.<\/p>\n<\/div><\/details>\n\n\n\n<details class=\"wp-block-crownoil-accordion accordion\" style=\"--accordion-clr-1:#d8222a;--accordion-clr-2:#d8222a\"><summary class=\"accordion__header\">Video explainer on fuel polishing<\/summary><div class=\"accordion__body\">\n<p>Watch our short explanatory video on our completely non-disruptive fuel polishing service to help you get the most out of your assets.<\/p>\n\n\n\n<div class=\"wp-block-crownoil-content-spacer content-spacer\">\n<figure class=\"wp-block-embed is-type-rich is-provider-embed-handler wp-block-embed-embed-handler wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"Diesel Fuel Polishing - Fuel Sludge Removal | Crown Oil\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/MhMRxO8KE2I?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n<\/div>\n<\/div><\/details>\n<\/div>\n<\/article>\n\n\n\n<article class=\"wp-block-crownoil-tabs-panel tabs__panel\">\n<div class=\"wp-block-crownoil-content-spacer content-spacer\">\n<button class=\"wp-block-crownoil-accordion-toggle-all accordion__toggle-all\">Toggle All +<\/button>\n\n\n\n<details class=\"wp-block-crownoil-accordion accordion\" style=\"--accordion-clr-1:#d8222a;--accordion-clr-2:#d8222a\"><summary class=\"accordion__header\">How does a diesel fuel polishing system work?<\/summary><div class=\"accordion__body\">\n<p>This is an advanced level filtration of fuel that is monitored and controlled using a central processing unit through a combination of depolymerisation and filtration. Fuel is passed through different equipment to progressively remove finer contaminants at different stages.<\/p>\n\n\n\n<p>Several stages using different filter technologies are key, as a single process is not adequate to remove the solid particulates, water and wet foreign matter found.<\/p>\n\n\n\n<p>The first stage of Crown Oil\u2019s fuel tank polishing involves fuel being filtered through increasingly finer filters until it&#8217;s \u2018clean\u2019 and reaches a filtration level of 1 micron absolute &#8211; an industry best.<\/p>\n\n\n\n<p>Once complete, our diesel fuel polishing unit then uses advanced depolymerising technology to break down harmful particulates to \u2018polish\u2019 your fuel to perfection.<\/p>\n\n\n\n<div class=\"wp-block-crownoil-content-spacer content-spacer\"><div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"1144\" height=\"726\" src=\"https:\/\/www.crownoil.co.uk\/wp-content\/uploads\/2019\/01\/Fuel-Polishing-1.png\" alt=\"Fuel Polishing\" class=\"wp-image-96364\" srcset=\"https:\/\/www.crownoil.co.uk\/wp-content\/uploads\/2019\/01\/Fuel-Polishing-1.png 1144w, https:\/\/www.crownoil.co.uk\/wp-content\/uploads\/2019\/01\/Fuel-Polishing-1-300x190.png 300w, https:\/\/www.crownoil.co.uk\/wp-content\/uploads\/2019\/01\/Fuel-Polishing-1-1024x650.png 1024w, https:\/\/www.crownoil.co.uk\/wp-content\/uploads\/2019\/01\/Fuel-Polishing-1-768x487.png 768w\" sizes=\"auto, (max-width: 1144px) 100vw, 1144px\" \/><\/figure>\n<\/div><\/div>\n<\/div><\/details>\n\n\n\n<details class=\"wp-block-crownoil-accordion accordion\" style=\"--accordion-clr-1:#d8222a\"><summary class=\"accordion__header\">Are all fuel polishing systems the same?<\/summary><div class=\"accordion__body\">\n<p>Simply put, no. Systems can filter different quantities of fuel at different rates, for example, some systems filter big quantities of fuel quickly, whereas others will filter small quantities at a slower pace.<\/p>\n\n\n\n<p>Another difference is that there\u2019s a huge difference in the quality of the polished fuel &#8211; many companies do not have the functionality to filter out water. Unfortunately, this means that diesel bacteria will continue to grow 260,000 times every 6 hours, leaving your expensive systems at high risk.<\/p>\n<\/div><\/details>\n\n\n\n<details class=\"wp-block-crownoil-accordion accordion\" style=\"--accordion-clr-1:#d8222a\"><summary class=\"accordion__header\">What affects the speed of fuel polishing systems?<\/summary><div class=\"accordion__body\">\n<p>Using a pump, contaminated fuel is pushed through filters; it\u2019s harder to force contaminated fuel through a finer filter, so higher quality results usually take longer to achieve. What\u2019s more, a system that uses higher pressure will result in more rapid filtration.<\/p>\n\n\n\n<p>High-speed and high-quality filtration need high pressure and finer filters, meaning the larger the volume of fuel, the more powerful the equipment needed.<\/p>\n<\/div><\/details>\n\n\n\n<details class=\"wp-block-crownoil-accordion accordion\" style=\"--accordion-clr-1:#d8222a;--accordion-clr-2:#d8222a\"><summary class=\"accordion__header\">I add additives to my fuel; do I still need a fuel polishing service?<\/summary><div class=\"accordion__body\">\n<p>Additives slow fuel degradation, but they don\u2019t completely prevent the buildup of contaminants that form in a tank. Therefore, a combination of fuel polishing and additives is needed to fully protect your fuel operation.<\/p>\n<\/div><\/details>\n\n\n\n<details class=\"wp-block-crownoil-accordion accordion\" style=\"--accordion-clr-1:#d8222a;--accordion-clr-2:#d8222a\"><summary class=\"accordion__header\">How will I know if fuel is sufficiently cleaned?<\/summary><div class=\"accordion__body\">\n<p>Water content and particle size are the two main measures of fuel contaminants.<\/p>\n\n\n\n<p>The first indication of how effective your diesel polishing has been is to look at your fuel\u2019s visual appearance. It should appear bright and clear with no visible signs of free water, sediment or particulate.<\/p>\n\n\n\n<p>However, if fuel has been polished but still contains particles greater than around 5 microns, your equipment remains at great risk. Even if you can\u2019t see any water, there will still be water suspended in the fuel itself, which will enhance bacterial growth. Water level is measured in parts per million (ppm).<\/p>\n\n\n\n<p>Crown Oil\u2019s fuel polishing equipment filters to below 1 micron and removes water to 100ppm &#8211; an industry best!<\/p>\n<\/div><\/details>\n<\/div>\n<\/article>\n\n\n\n<article class=\"wp-block-crownoil-tabs-panel tabs__panel\">\n<div class=\"wp-block-crownoil-content-spacer content-spacer\">\n<button class=\"wp-block-crownoil-accordion-toggle-all accordion__toggle-all\">Toggle All +<\/button>\n\n\n\n<details class=\"wp-block-crownoil-accordion accordion\" style=\"--accordion-clr-1:#d8222a;--accordion-clr-2:#d8222a\"><summary class=\"accordion__header\">Will fuel polishing disrupt my business?<\/summary><div class=\"accordion__body\">\n<p>No, the process will cause almost zero disruption to your operations. Equipment and machinery can continue running while the fuel polishing equipment does its job, as the fuel remains in the tank while the contaminants are filtered out.<\/p>\n<\/div><\/details>\n\n\n\n<details class=\"wp-block-crownoil-accordion accordion\" style=\"--accordion-clr-1:#d8222a\"><summary class=\"accordion__header\">How long will fuel polishing take?<\/summary><div class=\"accordion__body\">\n<p><strong>The duration of a fuel polishing service depends on a number of factors, such as:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Tank size<\/li>\n\n\n\n<li>Current quality of fuel<\/li>\n\n\n\n<li>Equipment used<\/li>\n\n\n\n<li>Amount of fuel being polished<\/li>\n<\/ul>\n\n\n\n<p>Our advanced filtration system is a fast process that removes harmful contaminants simultaneously whilst minimising our time on-site. With Crown Oil, up to 25,000 litres of fuel can be polished within 1 hour.<\/p>\n<\/div><\/details>\n\n\n\n<details class=\"wp-block-crownoil-accordion accordion\" style=\"--accordion-clr-1:#d8222a;--accordion-clr-2:#d8222a\"><summary class=\"accordion__header\">How often should diesel fuel be polished?<\/summary><div class=\"accordion__body\">\n<p>This depends entirely on the application. We recommend the process at least once a year if the stored fuel is intended for back-up power. In critical facilities such as hospitals and data centres, to ensure there\u2019s no halt in operations, we recommend a treatment every 2 years at least.<\/p>\n<\/div><\/details>\n<\/div>\n<\/article>\n\n\n\n<article class=\"wp-block-crownoil-tabs-panel tabs__panel\">\n<div class=\"wp-block-crownoil-content-spacer content-spacer\">\n<button class=\"wp-block-crownoil-accordion-toggle-all accordion__toggle-all\">Toggle All +<\/button>\n\n\n\n<details class=\"wp-block-crownoil-accordion accordion\" style=\"--accordion-clr-1:#d8222a;--accordion-clr-2:#d8222a\"><summary class=\"accordion__header\">How much does fuel polishing cost?<\/summary><div class=\"accordion__body\">\n<p>Due to its intricacy and involvement of highly specialised equipment, lots of people think that fuel polishing is expensive. However, it\u2019s actually one of the most cost-effective treatments available when looking at all considerations, such as:<\/p>\n\n\n\n<ul class=\"wp-block-list tick-list\">\n<li>No need to buy a replacement batch of fresh fuel<\/li>\n\n\n\n<li>Minimal disruption to services<\/li>\n\n\n\n<li>Avoids the cost and waste of disposing of a contaminated supply<\/li>\n<\/ul>\n<\/div><\/details>\n\n\n\n<details class=\"wp-block-crownoil-accordion accordion\" style=\"--accordion-clr-1:#d8222a;--accordion-clr-2:#d8222a\"><summary class=\"accordion__header\">Fuel polishing near me?<\/summary><div class=\"accordion__body\">\n<p>Crown Oil provides a vast range of diesel fuel polishing equipment for large and small enterprises. Our systems filter out particulates to under 1 micron, which makes us one of the only companies that reach this high level of cleaning. The quality of our equipment speaks for itself, so contact us today to learn more.<\/p>\n<\/div><\/details>\n<\/div>\n<\/article>\n<\/div>\n<\/div>\n<\/div><\/div>\n<\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<div class=\"wp-block-crownoil-content-spacer content-spacer\">\n<div class=\"wp-block-crownoil-cards cards\">\n<a class=\"wp-block-crownoil-card cards__item\" href=\"https:\/\/www.crownoil.co.uk\/faq\/\"><h3 class=\"cards__title\">View More FAQs<\/h3><div class=\"cards__description\"><p>Check out our other FAQs, answered by our team of experts.<\/p><\/div><span class=\"accent-link\">Read more<\/span><\/a>\n\n\n\n<a class=\"wp-block-crownoil-card cards__item\" href=\"https:\/\/www.crownoil.co.uk\/services\/environmental\/fuel-polishing\/\"><h3 class=\"cards__title\">Fuel Polishing Services<\/h3><div class=\"cards__description\"><p>Learn more about fuel polishing, its benefits, and how to request a quote.<\/p><\/div><span class=\"accent-link\">Read more<\/span><\/a>\n<\/div>\n<\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<div class=\"wp-block-crownoil-content-spacer content-spacer\">\n<div class=\"wp-block-crownoil-well well\" style=\"--bg-clr:var(--pale-grey)\">\n<p><strong>If you have any questions about our fuel polishing service, call our experts today on <a href=\"tel:03301231444\" class=\"rulertel\">0330 123 1444<\/a>. We\u2019ll be happy to discuss your requirements and answer any additional questions about fuel polishing, along with our other fuels and services.<\/strong><\/p>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":2,"featured_media":0,"parent":97019,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-99801","page","type-page","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.7 (Yoast SEO v26.7) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Fuel Polishing FAQs - How Does Fuel Cleaning Work? | Crown Oil<\/title>\n<meta name=\"description\" content=\"Find information on fuel polishing &amp; how our services could benefit you. 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